[lkml]   [2021]   [Dec]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 1/2] tpm: Fix error handling in async work
On 12/28/21 15:47, Jarkko Sakkinen wrote:
>> When an invalid (non existing) handle is used in a tpm command,
>> that uses the resource manager interface (/dev/tpmrm0) the resource
>> manager tries to load it from its internal cache, but fails and
>> returns an -EINVAL error to the caller. The existing async handler
>> doesn't handle these error cases currently and the condition in the
>> poll handler never returns mask with EPOLLIN set causing the userspace
>> code to get stack. Make sure that error conditions also contribute
>> to the poll mask so that a correct error code could passed back
>> to the caller.
> Can you instead describe a failure scenario? This is very cryptic.

The problem is that the poll call blocks and the application gets stuck
until the tpm_timeout_work() wakes it up after 120 sec (jiffies + (120 * HZ)).
I will update the description, fix all the typos, and resend it.


 \ /
  Last update: 2021-12-29 01:09    [W:0.038 / U:0.784 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site